Cardio Does Not Burn Muscle Mass

Let's say it like this....

Cardio burns muscle mass when there is not enough energy in the body (carbs) and all of the ATP stores have been depleted. Your body then begins to use amino acids (proteins your muscle) to convert to ATP to use for energy.

So... yes cardio does burn muscle mass if you do so much of it with too little energy (carbs) in your body.

You can't make a blanket statement about something like that. You will get eaten alive on this website for something like that.

Plus, I've never seen this Scooby website before but... if he calls himself Scooby... I would have a difficult time finding him credible. Then again I have a hard time finding people with normal names credible when they just make stuff up and put it on a website....

This is the correct answer. It's called Gluconeogenesis

Let's say it like this....

Cardio burns muscle mass when there is not enough energy in the body (carbs) and all of the ATP stores have been depleted. Your body then begins to use amino acids (proteins your muscle) to convert to ATP to use for energy.

So... yes cardio does burn muscle mass if you do so much of it with too little energy (carbs) in your body.

You can't make a blanket statement about something like that. You will get eaten alive on this website for something like that.

Plus, I've never seen this Scooby website before but... if he calls himself Scooby... I would have a difficult time finding him credible. Then again I have a hard time finding people with normal names credible when they just make stuff up and put it on a website....

At what % of body fat does this start to happen? Please cite sources.

The body doesn't work that way. It doesn't suck all the fat out before it starts converting amino acids to use as energy. the body isn't that smart... My textbook is 4 hours away from me right now or I'd scan the page for you... sorry.....

Just have to love the people who refute the assertion and question the sources without providing any sources of their own

Google Gluconeogenesis

Thank you.

I'm at work right now and knew I should not have opened this post haha.

Anyone who does cardio regularly already knows how much muscle it builds, retains or burns for them. But since my heart is one of my favorite muscles, even if I can't show it off in an online pic, I'll keep doing my regular cardio exercises.

Absolutely! There is nothing at all wrong with cardio and it is great for you. Also it can BUILD muscle if there is also some sort of resistance built in such as the push off when you are running or the pedaling on a bicycle. No doubt about it.

Do heals crit?

Just have to love the people who refute the assertion and question the sources without providing any sources of their own

Google Gluconeogenesis

Thank you.

I'm at work right now and knew I should not have opened this post haha.

Google "cardio does not burn muscle."

Seems we're at an impasse then

Except that the word he gave you is a scientific bodily function that is explained in textbooks that pertain to fitness, nutrition, kinesiology and the like. Not a sentence someone put together.

Let's say it like this....

Cardio burns muscle mass when there is not enough energy in the body (carbs) and all of the ATP stores have been depleted. Your body then begins to use amino acids (proteins your muscle) to convert to ATP to use for energy.

So... yes cardio does burn muscle mass if you do so much of it with too little energy (carbs) in your body.

You can't make a blanket statement about something like that. You will get eaten alive on this website for something like that.

Plus, I've never seen this Scooby website before but... if he calls himself Scooby... I would have a difficult time finding him credible. Then again I have a hard time finding people with normal names credible when they just make stuff up and put it on a website....

At what % of body fat does this start to happen? Please cite sources.

The body doesn't work that way. It doesn't suck all the fat out before it starts converting amino acids to use as energy. the body isn't that smart... My textbook is 4 hours away from me right now or I'd scan the page for you... sorry.....

Don't scan it, that would be a copyright violation just the title and, perhaps, the studies the textbook relies on would be helpful.

My understanding (and I'm open to change in light of new evidence) is that in aerobic exercise the body's first choice for energy is carbs (glycogen stored in muscle & your liver) then fat and lastly lean muscle mass (given an adequate level of dietary protein)

Just have to love the people who refute the assertion and question the sources without providing any sources of their own

Google Gluconeogenesis

Thank you.

I'm at work right now and knew I should not have opened this post haha.

Nevermind, looks like you agree in part.

I never completely disagreed with you in the first place. I am just saying it's easier to begin to burn muscle mass than you're trying to say it is. It is something that has been known and studied for a long time and your studies aren't backing up what you're saying with scientific evidence.

gluconeogenesis [gloo″ko-ne″o-jen´ĕ-sis]
the synthesis of glucose from noncarbohydrate sources, such as amino acids and glycerol. It occurs primarily in the liver and kidneys whenever the supply of carbohydrates is insufficient to meet the body's energy needs. Gluconeogenesis is stimulated by cortisol and other glucocorticoids and by the thyroid hormone thyroxine. Formerly called glyconeogenesis.

http://medical-dictionary.thefreedictionary.com/gluconeogenesis

"Gluconeogenesis is the process of synthesizing glucose from non-carbohydrate sources. The starting point of gluconeogenesis is pyruvic acid, although oxaloacetic acid and dihydroxyacetone phosphate also provide entry points. Lactic acid, some amino acids from protein and glycerol from fat can be converted into glucose."

http://www.elmhurst.edu/~chm/vchembook/604glycogenesis.html



This is what happens when you do cardio without eating enough carbohydrates to supply your body with enough energy. Also, your body does not entirely use the carbohydrates as energy. This will cause your body to eat your muscles while doing cardio activities.

Do heals crit?

gotta spec for crits bro and try to up your crit chance with gears

I made the point before, but I'm still baffled that people feel the need to argue this. If you're in caloric deficit your body will be more likely to shed tissue that you're not using as a priority. this it.. /thread. There is no debate on this.

So what does it mean?
If you do no resistance training that uses type II fibre while in caloric deficit, you will lose type II fibre.

If you do resistance training that uses all type II fibre while in caloric deficit, you'll retain more type II fibre than not exercising.

cardio is relatively independent of this. It's just mentioned because FAR too many people think that cardio is the only thing, or best thing to do for fat loss, so thats all they do for exercise, while not realizing they may be hindering their results.

As for the study on the front page, when you test people who have done thousands of miles of long distance running already, i'm not surprised they don't lose any muscle mass after running another thousand. They have already lost all they are going to lose by that point... big shocker they don't see much further change.

Yes I'm laughing my aZZ off.

Bro, cardio doesn't burn muscle!

I don't know why people would dare to argue with a guy that wears his sunglasses in the bar. Silly, silly people.

i have to wonder if you got my meaning

Cardio doesn't kill gains, skateboard squats kills gains

>tfw scooby is god

Sure, well tell me how easier it is. It seems you have to do a heck of a lot of cardio to burn muscle mass given adequate caloric and protein intake. My understanding is that consuming less than 20 percent TDEE could result in muscle mass loss, and running dozens of miles a day could do that too.

There's an academic side to the argument and a practical side. For the practical side, my understanding is that, for the vast majority of people on here, a 500-1,000 net calorie deficit with adequate protein intake, plus 45 minutes of cardio five times a week isn't going to burn muscle mass. There are people on this board very afraid of 30-45 minutes of cardio precisely for what I think are severe outlier situations in which cardio might burn muscle mass.

But, correct me if I'm wrong and tat a 3 or 4-mile run a few times a week is burning through muscles? My situation, and what I've found, is the exact opposite.

Are you doing resistance training while you're in caloric deficit too? if you are, you're fine. If you're not, you'll lose a lot more lean mass. is this really so hard to understand?

Scooby is god.